Ophthalmic examination auxiliary device

Abstract

The invention provides an ophthalmic examination auxiliary device, and relates to the technical field of ophthalmic examination, the ophthalmic examination auxiliary device comprises a base, a mounting seat fixedly connected with one side of the base, a support frame arranged on the working surface of the top end of the mounting seat, and an eyelid turning mechanism connected with the support frame through a moving mechanism; a lower jaw supporting plate is arranged on the mounting seat, and the lower jaw supporting plate is positioned on the opposite side of the supporting frame; the support frame is clamped with the forehead support plate; the eyelid turning mechanism comprises oppositely-arranged limiting frames, an adjusting piece penetrating through the limiting frames and an eyelid opener connected with the telescopic end of the adjusting piece. The limiting frame has an inclined radian matched with an eyelid; through the arrangement of the eyelid turning mechanism, the limiting frame and the adjusting piece which are matched with the radian of the eyelid are adopted, multi-point accurate force application can be carried out according to the wrinkle sagging conditions of different positions of the eyes of the old people, so that the eyelid is stably and comprehensively turned over, and a clear and unshielded observation view is provided for slit lamp inspection.

Description

Technical Field

[0001] This invention relates to the field of ophthalmic examination technology, and in particular to an ophthalmic examination auxiliary device. Background Technology

[0002] Cataracts are the leading cause of blindness in my country, severely impacting the quality of life for the elderly. According to the latest statistics, by the end of 2024, my country's population aged 60 and above had exceeded 300 million, accounting for 22% of the total population; among them, approximately 210 million suffered from cataracts to varying degrees. With the accelerating aging of society, the number of elderly people is increasing year by year, and the group of patients with age-related cataracts is also showing a continuous expansion trend, with approximately 400,000 to 500,000 new cases each year.

[0003] Slit-lamp examination is a core tool for cataract diagnosis, condition assessment, and preoperative screening. It uses precisely projected light to observe the anterior structures of the eye, including the degree of lens opacity, eyelids, conjunctiva, and cornea, providing crucial information for clinical diagnosis and treatment. However, in actual examinations of elderly cataract patients, age-related factors such as decreased eyelid skin elasticity, reduced dermal collagen, and broken elastic fibers often result in drooping eyelids with increased wrinkles and drooping. In severe cases, eyelid drooping can obstruct the pupil, creating visual field obstruction. These ocular characteristics prevent the eyelids from naturally opening during conventional slit-lamp examination, causing wrinkles to accumulate and obstruct the examination area, making it difficult for medical staff to clearly observe key areas such as the lens and fundus, directly affecting diagnostic accuracy.

[0004] To address the aforementioned issues, several auxiliary eyelid-opening devices have emerged on the market. For example, an ophthalmic examination auxiliary device disclosed in CN117694816A, while capable of opening the eyelids by driving a support strip with a power component, struggles to accurately adapt to the varying folds and drooping of the eyelids in elderly individuals due to the support strip's close contact with the eyelid. This can lead to incomplete eyelid eversion and residual folds obstructing the field of vision, failing to provide clear and unobstructed observation conditions for slit-lamp examinations. Furthermore, the differences in the laxity and physiological size of the upper and lower eyelids necessitate varying opening distances. Existing technologies often employ fixed or single-adjustment modes for the opening stroke, failing to achieve differentiated adjustment of the upper and lower eyelid eversion distances. This can result in uneven eyelid eversion, increasing examination errors and potentially causing pain and discomfort to patients due to excessive traction on the lax eyelids, thus reducing patient cooperation.

[0005] Therefore, there is an urgent need for an ophthalmic examination auxiliary device that can be specifically adapted to the characteristics of eyelid laxity and wrinkles in elderly patients and achieve flexible and precise adjustment. Summary of the Invention

[0006] The purpose of this invention is to provide an ophthalmic examination auxiliary device that solves the problem in the prior art that it cannot adapt to the characteristics of eyelid laxity and wrinkles in elderly patients and achieve flexible and precise adjustment.

[0007] To achieve the above-mentioned objectives, the technical solution adopted by this invention is as follows:

[0008] An ophthalmic examination auxiliary device includes: a base, a mounting seat fixedly connected to one side of the base, a support frame disposed on the working surface at the top of the mounting seat, and an eyelid-turning mechanism connected to the support frame via a moving mechanism; the mounting seat is provided with a chin support plate, the chin support plate being located on the opposite side of the support frame; the support frame is engaged with a forehead support plate; the eyelid-turning mechanism includes: a limiting frame disposed opposite to each other, an adjusting member passing through the limiting frame, and an eyelid opener connected to the telescopic end of the adjusting member; the limiting frame has an inclined arc adapted to the eyelid; a plurality of adjusting members disposed on one side of the limiting frame are equidistantly arranged along the inclined arc of the limiting frame; the number of adjusting members disposed on the other side of the limiting frame is one, and it is located in the middle position of the limiting frame.

[0009] Furthermore, the moving mechanism includes: a first moving component and a second moving component connected to one working surface of the first moving component; the first moving component is slidably connected to the support frame and a guide rod disposed on the bottom working surface of the forehead support plate; one side of the second moving component is connected to an auxiliary support mechanism, and one side of the auxiliary support mechanism is connected to the eyelid turning mechanism, which is used to adjust the opening and closing distance of the eyelid turning mechanism.

[0010] Furthermore, the adjusting component includes: a fixed cylinder and a pull rod slidably connected to the fixed cylinder; an adjusting handwheel is provided through the working surface at the top of the fixed cylinder; one end of the adjusting handwheel is located inside the fixed cylinder and is fixedly connected to a bolt; a silicone pad is provided on the side of the pull rod near the eyelid opener, and an internal thread is provided on it, which is threadedly connected to the bolt; by turning the adjusting handwheel, the pull rod is driven to move up and down within a preset trajectory of the fixed cylinder.

[0011] Furthermore, the eyelid opener includes a first eyelid hook and a second eyelid hook; the second eyelid hook is larger than the working size of the first eyelid hook; the first eyelid hook is connected to the pull rod on one side; and the second eyelid hook is connected to the pull rod on the opposite side.

[0012] Furthermore, the first moving component includes: a moving block, on which a first sliding groove and a second sliding groove are sequentially formed along its axial direction; the first sliding groove is slidably connected to the support frame; the second sliding groove is slidably connected to the guide rod; a positioning member is provided through one side of the moving block, the positioning member is threadedly connected to the moving block, and a stop is provided on one side, the stop abutting against the arc-shaped groove formed on the support frame.

[0013] Furthermore, the second movable component includes: a connecting frame, a receiving plate that can move freely within the connecting frame, and a limiting pin that is inserted into the connecting frame; the connecting frame is symmetrically provided with a plurality of first limiting holes; one end of the receiving plate is connected to the auxiliary support mechanism, and a plurality of second limiting holes are provided thereon, the second limiting holes having the same diameter as the first limiting holes; the limiting pin passes through the first limiting holes and the second limiting holes in sequence, and limits and fixes the receiving plate.

[0014] Furthermore, the auxiliary support mechanism includes: a housing, a base disposed on one working surface of the housing, and support arms disposed opposite to each other and slidably connected to a slide rod on the base; a gear drive device is provided inside the housing, and a rotating rod is provided through one side, the rotating rod being fixedly connected to the gear drive device, and a locking device is fitted over it; a return spring is provided on the opposite side of the support arm, and a rack is provided near the gear drive device, the rack meshing with the gear drive device; the two support arms are respectively fixedly connected to two limiting frames on the eyelid-turning mechanism through a first connecting arm and a second connecting arm; the second connecting arm is 1 / 3 the length of the first connecting arm.

[0015] Furthermore, the chin support plate is slidably connected to the mounting base and threadedly connected to the threaded rod. The bottom end of the threaded rod is connected to a horizontal plate located inside the mounting base, and a driven bevel gear is sleeved on the plate. A knob is provided on one side of the mounting base. The knob passes through one side of the mounting base and is sleeved with the driving bevel gear. The driving bevel gear and the driven bevel gear mesh with each other.

[0016] Furthermore, slots are formed on both sides of the forehead support plate, and the slots engage with the support frame.

[0017] Furthermore, a connecting frame is provided at the top of the support frame.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] (i) The present invention uses a limit frame and adjustment component that are adapted to the curvature of the eyelid through the setting of the eyelid flipping mechanism. When in use, medical staff can move the pull rod and eyelid opener by turning the adjustment handwheel. The eyelid opener can fit closely to the loose eyelid of the elderly and apply force at multiple points to the folds and drooping conditions in different positions, so as to smoothly and fully flip the eyelid, completely open the examination area of ​​the eyeball, and provide a clear and unobstructed field of vision for slit lamp examination.

[0020] (ii) In this invention, by setting up first connecting arms and second connecting arms of different lengths and multiple different adjusting components, it is possible to flexibly adjust according to the different opening distances of the upper and lower eyelids, avoiding examination errors caused by uneven eyelid opening, while improving the examination comfort of elderly patients, making early detection and timely treatment of cataracts possible; in clinical applications, this device significantly shortens the examination time for elderly patients, improves the accuracy of examination and patient satisfaction;

[0021] (III) Through the coordinated operation of the moving mechanism and the auxiliary support mechanism, this invention can be flexibly adapted to the individual differences of elderly patients in terms of body shape and eye position. The first and second moving components in the moving mechanism can drive the eyelid turning mechanism to make multi-dimensional adjustments. The auxiliary support mechanism can precisely control the opening and closing stroke requirements of the two limit frames through the meshing of the gear drive device and the rack and pinion, ensuring that the eyeball observation area is within the best examination field of the slit lamp after eyelid turning, helping medical staff to clearly observe key examination areas such as the degree of lens opacity and fundus condition, and improving the accuracy of cataract diagnosis. Attached Figure Description

[0022] Figure 1 This is a perspective view of an ophthalmic examination auxiliary device disclosed in this invention;

[0023] Figure 2 This is an overall diagram of an ophthalmic examination auxiliary device disclosed in this invention;

[0024] Figure 3 This is a front view of an ophthalmic examination auxiliary device disclosed in this invention;

[0025] Figure 4 This is an enlarged schematic diagram of the moving mechanism, auxiliary support mechanism, and eyelid-turning mechanism (part A) of an ophthalmic examination auxiliary device disclosed in this invention;

[0026] Figure 5 This is a perspective view of the connection state of the moving mechanism, auxiliary support mechanism and eyelid-turning mechanism of an ophthalmic examination auxiliary device disclosed in this invention.

[0027] Figure 6 This is an enlarged schematic diagram of the locking device (part B) of an ophthalmic examination auxiliary device disclosed in this invention;

[0028] Figure 7 This is a perspective view of a limiting pin of an ophthalmic examination auxiliary device disclosed in this invention;

[0029] Figure 8 This is a schematic diagram showing the connection between the auxiliary support mechanism and the eyelid-turning mechanism of an ophthalmic examination auxiliary device disclosed in this invention;

[0030] Figure 9This is a front view of the eyelid eversion mechanism of an ophthalmic examination auxiliary device disclosed in this invention;

[0031] Figure 10 This is a schematic diagram of the internal structure of the adjusting component of an ophthalmic examination auxiliary device disclosed in this invention;

[0032] Figure 11 This is a schematic diagram of the eyelid opener connection of an ophthalmic examination auxiliary device disclosed in this invention;

[0033] Figure 12 This is a schematic diagram of the internal structure of the mounting base disclosed in this invention;

[0034] In the diagram: 1. Base; 2. Mounting seat; 3. Support frame; 31. Arc groove; 4. Connecting frame; 5. Jaw support plate; 51. Knob; 52. Fixing column; 53. Driving bevel gear; 54. Driven bevel gear; 55. Threaded rod; 56. Horizontal plate; 6. Forehead support plate; 61. Slot; 62. Adhesive part; 63. Guide rod; 7. Moving mechanism; 71. First moving component; 711. Moving block; 712. First slide groove; 713. Second slide groove; 714. Positioning component; 715. Abutment block; 72. Second moving component; 721. Connecting frame; 722. Support plate; 723. First limiting hole; 724. Second limiting hole; 725. Limiting pin; 8. Auxiliary support mechanism; 81. Outer shell; 82. Base; 83. Support arm; 84. Gear drive device; 85. Rack; 86. Return spring; 87. Slide rod; 88. First connecting arm; 89. Second connecting arm; 9. Eyelid turning mechanism; 91. Limiting frame; 92. Adjusting component; 921. Fixing cylinder; 922. Pull rod; 923. Adjusting handwheel; 924. Bolt; 925. Internal thread; 93. Eyelid opener; 931. First eyelid hook; 932. Second eyelid hook; 94. Silicone pad. Detailed Implementation

[0035] To make the content of this invention easier to understand, the technical solutions of the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings. Identical components are represented by the same reference numerals. It should be noted that the terms "front," "rear," "left," "right," "up," and "down" used in the following description refer to directions in the accompanying drawings, while the terms "inner" and "outer" refer to directions toward or away from the geometric center of a specific component, respectively.

[0036] Figure 1 This is a perspective view of an ophthalmic examination auxiliary device disclosed in this invention; Figure 2 This is an overall diagram of an ophthalmic examination auxiliary device disclosed in this invention; Figure 3 This is a front view of an ophthalmic examination auxiliary device disclosed in this invention; as shown... Figure 1-3As shown, this embodiment provides an ophthalmic examination auxiliary device, including: a base 1, a mounting seat 2 fixedly connected to one side of the base 1, a support frame 3 disposed on the top working surface of the mounting seat 2, and a folding mechanism 9 connected to the support frame 3 via a moving mechanism 7; the shape of the base 1 in this invention is only for illustration purposes, and the actual shape is based on the existing slit lamp mounting seat. The base 1 provides a stable mounting condition for the slit lamp, ensuring the observation accuracy during slit lamp examination; the mounting seat 2 is provided with a chin support plate 5, which is located on the opposite side of the support frame 3, and its height can be adjusted according to the patient's body shape, allowing the patient to comfortably place their chin for initial positioning; the support frame 3 is vertically installed on the top working surface of the mounting seat 2, and is made of high-strength aluminum alloy material, which can stably support the moving mechanism 7 and the folding mechanism 9. The eyelid mechanism 9 has a connecting frame 4 at its top. The support frame 3 is engaged with the forehead support plate 6. The forehead support plate 6 has slots 61 on both sides, which engage with the support frame 3, enabling precise and quick installation of the forehead support plate 6. It adopts an ergonomic design and has an arc shape on the side facing the patient's head that matches the contour of the forehead, allowing it to fit closely to the patient's forehead skin and avoid discomfort caused by local pressure. Together with the chin support plate 5, it forms a bidirectional stable limit for the patient's head. The chin support plate 5 supports the chin for downward positioning, while the forehead support plate 6 fits against the forehead for upward limitation. Together, they limit the up-and-down and left-and-right movement of the head, effectively avoiding observation deviations caused by head displacement during the examination. This provides a reliable head fixation guarantee for the precise alignment of the eyelid mechanism 9 and clear observation with the slit lamp. Figure 1 This is a schematic diagram of the internal structure of the adjusting component of an ophthalmic examination auxiliary device disclosed in this invention; Figure 11 This is a schematic diagram of the eyelid opener connection of an ophthalmic examination auxiliary device disclosed in this invention; as shown. Figure 1-11As shown, the eyelid-opening mechanism 9 includes: a limiting frame 91 disposed opposite to each other, an adjusting member 92 passing through the limiting frame 91, and an eyelid opener 93 connected to the telescopic end of the adjusting member 92; the limiting frame 91 is made of medical-grade ABS material, and its contour has an inclined arc adapted to the eyelid, effectively dispersing the force application points and avoiding local force concentration that could cause pressure damage to the eyelid; to adapt to the fold distribution characteristics of different areas of the eyelid, the adjusting member 92 adopts a differentiated distribution layout; multiple adjusting members 92 disposed on one side of the limiting frame 91 are equidistantly arranged along the inclined arc of the limiting frame 91, which can achieve multi-point synchronous force application to areas with extensive fold distribution such as the upper eyelid, ensuring that the fold area is fully opened; the adjusting member 92 disposed on the other side of the limiting frame 91 is also distributed in a differentiated manner. The adjustable element 92 on frame 91 is singular and located in the middle of the limiting frame 91. It is adapted to the relatively flat and less wrinkled lower eyelid, achieving stable eyelid eversion through concentrated force at a single point. The limiting frame 91 and the adjustable element 92 will not contact the forehead support plate 6 during adjustment, ensuring smooth adjustment. The adjustable element 92 adopts a precise adjustment structure with threaded drive to ensure the controllability of the eyelid opening force and amplitude, adapting to eyelids with different degrees of relaxation. It includes: a fixed cylinder 921 and a pull rod 922 slidably connected to the fixed cylinder 921. An adjusting handwheel 923 is provided through the working surface at the top of the fixed cylinder 921. The adjusting handwheel 923 is located inside the fixed cylinder 921, with one end coaxial with the bolt 924. The connection is fixed, and the axis of bolt 924 is parallel to the sliding direction of pull rod 922 to ensure precise transmission. A silicone pad 94 is provided on the side of pull rod 922 near the eyelid opener 93. The silicone pad 94 is made of medical-grade silicone with a smooth and delicate surface, which can avoid friction damage to the eyelid skin of the elderly caused by rigid contact. Pull rod 922 has an internal thread 925, which is a fine-pitch thread design and is threadedly connected to bolt 924. The internal thread 925 and the thread of bolt 924 are compatible. Medical personnel can rotate pull rod 922 synchronously by turning the adjusting handwheel 923, thereby driving pull rod 922 to move up and down within the preset trajectory of fixed cylinder 921, precisely controlling the eyelid opening force and the eyelid flipping motion. The eyelid opening range is designed to avoid patient discomfort due to excessive adjustment and to accommodate eyelids with varying degrees of laxity. To further accommodate the physiological size differences between the upper and lower eyelids, the eyelid opener 93 employs a differentiated size design, specifically including a first eyelid hook 931 and a second eyelid hook 932. The second eyelid hook 932 is larger than the working size of the first eyelid hook 931. The working edges of the first and second eyelid hooks 931 and 932 are smoothly polished to prevent sharp edges from scratching the eyelids. The first eyelid hook 931 is connected to a pull rod 922 on one side to accommodate the more pronounced drooping upper eyelid; the second eyelid hook 932 is connected to the pull rod 922 on the opposite side to accommodate the lower eyelid with less laxity.The differentiated design ensures that both the upper and lower eyelids can be smoothly and fully opened, effectively reducing discomfort caused by traction in elderly patients and improving comfort and cooperation during the examination. When the eyelid-opening mechanism 9 is working, medical staff gently insert the first eyelid hook 931 and the second eyelid hook 932 into the upper and lower eyelids respectively, ensuring that the edges of the upper and lower eyelids are in close contact with the corresponding silicone pads 94. Then, based on the different folds and drooping conditions of the elderly patient's eyelids, the medical staff can specifically rotate the corresponding adjustment handwheel 923. For areas with multiple folds in the upper eyelid, the adjustment can be performed simultaneously or in stages. Tightening the corresponding adjustment handwheel 923 rotates the bolt 924, which in turn connects to the internal thread 925 of the pull rod 922. This causes the pull rod 922 to move, and the pull rod 922, via the first eyelid hook 931, causes the upper eyelid to be everted. For the lower eyelid, simply turning the adjustment handwheel 923 activates the second eyelid hook 932 for smooth eversion. Ultimately, this achieves full eversion of both the upper and lower eyelids, completely opening the examination area of ​​the eyeball and providing a clear, unobstructed field of vision for slit-lamp examination, thus assisting medical staff in accurately assessing cataract conditions.

[0037] Figure 4 This is an enlarged schematic diagram of the moving mechanism, auxiliary support mechanism, and eyelid-turning mechanism of an ophthalmic examination auxiliary device disclosed in this invention; as shown... Figure 4 As shown, the moving mechanism 7 includes: a first moving component 71 and a second moving component 72 connected to one working surface of the first moving component 71; the first moving component 71 is slidably connected to the support frame 3 and the guide rod 63 located on the bottom working surface of the forehead support plate 6, and the guide rod 63 limits the first moving component 71, so that the first moving component 71 always moves along the longitudinal direction of the support frame 3 during the movement, thereby driving the second moving component 72 and the eyelid turning mechanism 9 to adjust their positions, ensuring that the eyelid turning mechanism 9 is always aligned with the patient's eye area; the coordinated design of the first moving component 71 and the second moving component 72 realizes position adjustment in different directions, ensuring that the eyelid turning mechanism 9 can accurately adapt to the eye positioning needs of different elderly patients.

[0038] Figure 5 This is a perspective view of the connection state of the moving mechanism, auxiliary support mechanism and eyelid-turning mechanism of an ophthalmic examination auxiliary device disclosed in this invention. Figure 6 This is an enlarged schematic diagram of the locking device of an ophthalmic examination auxiliary device disclosed in this invention; Figure 7 This is a perspective view of a limiting pin in an ophthalmic examination auxiliary device disclosed in this invention; as shown... Figure 5-7As shown, the first moving component 71 includes: a moving block 711, on which a first sliding groove 712 and a second sliding groove 713 are sequentially formed along its axial direction; the first sliding groove 712 is slidably connected to the support frame 3; the second sliding groove 713 is slidably connected to the guide rod 63; to achieve stable positioning of the first moving component 71 after adjustment, a positioning member 714 is provided through one side of the moving block 711; the positioning member 714 adopts a threaded adjustment structure, which is threadedly connected to the moving block 711, and a stop block 715 is provided on one side; the stop block 715 is rotatably connected to the positioning member 714, and abuts against the arc-shaped groove 31 formed on the support frame 3; the stop block 715... Block 715 is adapted to the shape of the arc-shaped groove 31, and can be precisely embedded in the arc-shaped groove 31 and closely abut against it, thereby achieving reliable fixation of the first moving component 71 on the support frame 3 and preventing positional displacement caused by vibration or external force during inspection; the second moving component 72 includes: a connecting frame 721, a receiving plate 722 that can move freely within the connecting frame 721, and a limiting pin 725 that is inserted into the connecting frame 721; the connecting frame 721 is integrally formed from high-strength aluminum alloy material, which has advantages in structural strength and lightweight, and is rectangular in shape. Its inner wall, which connects to the receiving plate 722, is polished and coated with a wear-resistant coating, making the receiving plate 722... 2. Smooth and unobstructed movement; the receiving plate 722 is symmetrically provided with multiple first limiting holes 723; the receiving plate 722 is provided with multiple second limiting holes 724, the second limiting holes 724 having the same diameter as the first limiting holes 723, ensuring that the limiting pin 725 can be quickly fixed; the limiting pin 725 passes through the first limiting holes 723 and the second limiting holes 724 in sequence, and limits and fixes the receiving plate, the whole process is simple and efficient; during disassembly, medical staff can remove the limiting pin 725, and the planar position can be adjusted by the free movement of the receiving plate 722 within the connecting frame 721, which, together with the first moving component 71 that can be adjusted in the vertical direction, forms an eyelid eversion. The multi-dimensional adjustment of mechanism 9 fully adapts to the needs of elderly patients with different body shapes and head positions. When the moving mechanism 7 is in operation, medical staff pull the moving block 711 to move on the support frame 3 and guide rod 63. When the vertical direction reaches the required position, the medical staff screws the positioning part 714. At this time, the positioning part 714 drives the abutment block 715 to abut against the arc groove 31, thereby fixing the moving block 711. Then, the medical staff pulls the receiving plate 722 to move freely within the connecting frame 721, thereby achieving horizontal position adjustment. When the receiving plate 722 reaches the predetermined position, the medical staff inserts the limiting pin 725 into the first limiting hole 723 and the second limiting hole 724 to fix the receiving plate 722.

[0039] Figure 12 This is a schematic diagram of the internal structure of the mounting base disclosed in this invention; as shown. Figure 12As shown, the mandibular support plate 5 is embedded and slidably connected to the mounting base 2, and is threadedly connected to the threaded rod 55. The bottom end of the threaded rod 55 is rotatably connected to the horizontal plate 56 located inside the mounting base 2 via a bearing. The bearing reduces the radial friction when the threaded rod 55 rotates, ensuring a smooth and vibration-free adjustment process, and also provides reliable axial limiting for the threaded rod 55 to prevent deviation during lifting and lowering. The threaded rod 55 is sleeved with a driven bevel gear 54. A knob 51 is provided on one side of the mounting base 2. The surface of the knob 51 is evenly distributed with anti-slip texture to increase grip friction when medical staff operate it manually, preventing slippage. The knob 51 passes through one side of the mounting base 2 and is sleeved with the driving bevel gear 53. The driving bevel gear 53 and the driven bevel gear 54 mesh with each other to ensure efficient power transmission. By rotating knob 51 in either the forward or reverse direction, the threaded rod 55 can be rotated through the meshing transmission of bevel gears, thereby converting the rotational motion into the vertical lifting and lowering motion of the mandibular support plate 5. This provides high adjustment precision and is easy to operate, allowing for smooth height adjustment according to the patient's actual situation. Specifically, when it is necessary to adjust the height of the mandibular support plate 5 according to the elderly person's height and head contour, medical staff manually turn knob 51. Knob 51 drives the active bevel gear 53 to rotate synchronously. The active bevel gear 53 drives the threaded rod 55 to rotate through the driven bevel gear 54. Since the threaded rod 55 is threadedly connected to the mandibular support plate 5, and the mandibular support plate 5 can only move vertically, the rotation of the threaded rod 55 drives the mandibular support plate 5 to achieve vertical lifting and lowering motion, thereby adjusting the height of the mandibular support plate 5 upward or downward until it is adjusted to a position suitable for the elderly patient's comfortable jaw placement and stable head posture. It should be noted that the mandibular support plate 5 achieves height adjustment through a threaded transmission. The threaded transmission has self-locking properties, so once the position of the mandibular support plate 5 is adjusted, no additional locking components are needed to keep the mandibular support plate 5 stably at the target height. This avoids height deviation caused by vibration or external force during the examination, and provides a reliable head positioning guarantee for the accurate alignment of the subsequent eyelid lifting mechanism and the smooth conduct of slit lamp examination.

[0040] In another embodiment of the present invention, one end of the receiving plate 722 in the second moving component 72 is connected to the auxiliary support mechanism 8, and one side of the auxiliary support mechanism 8 is connected to the eyelid-turning mechanism 9. The auxiliary support mechanism 8 adjusts the opening and closing distance of the eyelid-turning mechanism 9 according to the different degrees of eyelid laxity in elderly patients and the varying needs for eyelid opening during examination; specifically, Figure 8 This is a schematic diagram showing the connection between the auxiliary support mechanism and the eyelid-turning mechanism of an ophthalmic examination auxiliary device disclosed in this invention; Figure 9 This is a front view of the eyelid-turning mechanism of an ophthalmic examination auxiliary device disclosed in this invention; as shown... Figure 8-9As shown, the auxiliary support mechanism 8 includes: a housing 81, a base 82 disposed on one working surface of the housing 81, and a support arm 83 disposed opposite to and slidably connected to a slide rod 87 on the base 82; a gear drive device 84 is provided inside the housing 81, the gear drive device 84 is composed of two identical driven gears, a driving gear coaxially disposed on the top of the two identical driven gears, and a transmission gear meshing with the driving gear; a rotating rod is provided through one side of the housing 81, the rotating rod is fixedly connected to the gear drive device 84, specifically, the rotating rod is connected to the transmission gear, and a locking device is fitted over it; as Figure 6 As shown, the locking device consists of a connecting circular plate sleeved with the rotating rod, an ear plate on one side of the connecting circular plate, a positioning pin penetrating the ear plate, and multiple positioning holes on one side of the working surface of the outer casing 81. These positioning holes are arranged in a circular array. After the rotating rod drives the gear drive device 84 to rotate, the locking device locks and fixes the rotating rod, ensuring the stability of the opening and closing distance of the eyelid-turning mechanism 9. A return spring 86 is provided on the opposite side of the support arm 83, providing elastic restoring force to the support arm 83 after opening and closing adjustment. This improves the convenience of adjustment operations; the support arm 83 is provided with a rack 85 on the side near the gear drive device 84, and the rack 85 meshes with the gear drive device 84; when the gear drive device 84 rotates under the drive of the rotating rod, the gear drive device 84 meshes with the rack 85, thereby driving the two support arms 83 to move closer or further apart along the slide rod 87, thereby realizing the opening and closing adjustment of the eyelid flipping mechanism 9; the two support arms 83 are respectively fixed to the two limiting frames 91 on the eyelid flipping mechanism 9 through the first connecting arm 88 and the second connecting arm 89. The first connecting arm 88 is one-third the length of the second connecting arm 89. The first connecting arm 88 is suitable for situations where the upper eyelid is more relaxed and requires a greater degree of eyelid opening, while the second connecting arm 89 is suitable for lower eyelids with shorter strokes. By setting connecting arms of different lengths, it is ensured that both the upper and lower eyelids can be fully exposed for examination, while avoiding increased patient discomfort due to excessive pulling of the lower eyelid, further improving the device's suitability for elderly patients. When the auxiliary support mechanism 8 is in operation, medical personnel rotate the lever to... The lever drives the transmission gear to rotate, and the rotation of the transmission gear drives the two driving gears to rotate in opposite directions. At this time, the driving gear drives the driven gear to rotate synchronously. The driven gear, through meshing with the rack 85, drives the support arm 83 to separate, and through the first connecting arm 88 and the second connecting arm 89, drives the limiting frames 91 at both ends to move away from each other until the distance required for the upper and lower eyelids of the elderly patient to be examined is reached. At this time, the medical staff presses the positioning pin to insert the positioning pin into the positioning hole to lock the rotating rod, ensuring the stability of the opening and closing distance of the eyelid flipping mechanism 9.

[0041] In another embodiment of the present invention, the mandibular support plate 5 has fixing posts 52 on both working surfaces, which are used to fix the disposable mandibular pad; the forehead support plate 6 has an adhesive part 62 on one side, which is adhesively connected to the disposable forehead pad; the disposable mandibular pad and the disposable forehead pad can be removed after each use to avoid the spread of pathogens between different patients, especially to prevent cross-infection of eye infections, and effectively isolate direct contact between patients and equipment; when installing the disposable mandibular pad and the disposable forehead pad, the installation can be completed by inserting the disposable mandibular pad into the fixing post 52.

[0042] The working principle of the technical solution provided by this invention is as follows:

[0043] In use, the elderly patient's chin is placed on the chin support plate 5. Medical staff adjust the distance between the chin support plate 5 and the forehead support plate 6 by turning knob 51 according to the patient's body shape. When the patient's forehead touches the forehead support plate 6, knob 51 is stopped. The chin support plate 5 and forehead support plate 6 work together to stabilize the patient's head. At this point, medical staff pull the moving block 711 according to the patient's eye position. When the vertical direction is parallel to the patient's eye level, the positioning piece 714 is turned to fix the moving block 711. Then, the medical staff pulls the receiving plate 722 within the connecting frame 721. The eyelid-turning mechanism 9 moves freely, allowing for horizontal position adjustment. Once the mechanism reaches the eye position of the elderly patient, medical staff insert the limiting pin 725 into the first limiting hole 723 and the second limiting hole 724 to fix the receiving plate 722. Then, by turning the rotating rod, the medical staff drives the transmission gear to rotate. The rotation of the transmission gear drives the two active gears to rotate in opposite directions. At this time, the active gear drives the driven gear to rotate synchronously. The driven gear, through meshing with the rack 85, causes the support arm 83 to separate, and through the first connecting arm 88 and the second connecting arm 89, it causes the limiting frames 91 at both ends to move away from each other until a suitable position for the elderly patient to be examined is reached. The required opening distance for the upper and lower eyelids is determined. At this point, medical staff press the positioning pin to lock the rotating rod in the positioning hole, ensuring the stability of the opening and closing distance of the eyelid-turning mechanism 9. Then, the medical staff insert the first eyelid hook 931 and the second eyelid hook 932 into the upper and lower eyelids of the elderly patient, respectively, so that the upper and lower eyelids contact the silicone pad 94. Next, the medical staff rotates the corresponding adjusting handwheel 923 according to the different folds and drooping conditions of the elderly patient's eyelids. The adjusting handwheel 923 drives the bolt 924 to rotate, and the bolt 924 is threadedly connected to the internal thread 925 of the pull rod 922, thereby moving the pull rod 922 towards the limiting frame 91. The slit lamp mechanism, through precise force application by multiple first eyelid hooks 931 and single-point force application by a second eyelid hook 932, drives the upper and lower eyelids to fully open, ensuring that the upper and lower eyelids of elderly patients are fully opened, completely opening the examination area of ​​the eyeball, and providing a clear and unobstructed field of vision for slit lamp examination. After the eyelids are turned and positioned, medical staff operate the slit lamp to examine the exposed area of ​​the patient's eyeball, observe the degree of lens opacity, fundus and other key parts, and complete the cataract condition assessment. During the examination, if it is necessary to fine-tune the field of vision, the corresponding positioning piece 714 and the limiting pin 725 can be loosened, and the adjusting piece 92 of the moving mechanism 7 or the eyelid turning mechanism 9 can be adjusted slightly to ensure a clear field of vision.

[0044] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An ophthalmic examination aid, characterized in that: include: The base (1), the mounting seat (2) fixedly connected to one side of the base (1), the support frame (3) provided on the top working surface of the mounting seat (2), and the eyelid turning mechanism (9) connected to the support frame (3) through the moving mechanism (7); The mounting base (2) is provided with a mandibular support plate (5), which is located on the opposite side of the support frame (3); the support frame (3) is engaged with the forehead support plate (6); The eyelid-turning mechanism (9) includes: a limiting frame (91) arranged opposite to each other, an adjusting member (92) passing through the limiting frame (91), and an eyelid opener (93) connected to the telescopic end of the adjusting member (92); the limiting frame (91) has an inclined arc adapted to the eyelid; a plurality of adjusting members (92) provided on one side of the limiting frame (91) are equidistantly arranged along the inclined arc of the limiting frame (91); the number of adjusting members (92) provided on the other side of the limiting frame (91) is one, and it is located in the middle of the limiting frame (91).

2. The ophthalmic examination assist device of claim 1, wherein: The moving mechanism (7) includes: a first moving component (71) and a second moving component (72) connected to one side of the working surface of the first moving component (71); the first moving component (71) is slidably connected to the support frame (3) and the guide rod (63) provided on the bottom working surface of the forehead support plate (6); one side of the second moving component (72) is connected to the auxiliary support mechanism (8), and one side of the auxiliary support mechanism (8) is connected to the eyelid turning mechanism (9), which is used to adjust the opening and closing distance of the eyelid turning mechanism (9).

3. The ophthalmic examination assisting device according to claim 1 or 2, characterized in that: The adjusting component (92) includes: a fixed cylinder (921) and a pull rod (922) slidably connected to the fixed cylinder (921). An adjusting handwheel (923) is provided through the working surface at the top of the fixed cylinder (921). One end of the adjusting handwheel (923) is located inside the fixed cylinder (921) and is fixedly connected to a bolt (924). A silicone pad (94) is provided on the side of the pull rod (922) near the eyelid opener (93), and an internal thread (925) is provided on it. The internal thread (925) is threadedly connected to the bolt (924). By turning the adjusting handwheel (923), the pull rod (922) is driven to move up and down within the preset trajectory of the fixed cylinder (921).

4. The ophthalmic examination auxiliary device according to claim 3, characterized in that: The eyelid opener (93) includes a first eyelid hook (931) and a second eyelid hook (932); the second eyelid hook (932) is larger than the working size of the first eyelid hook (931); the first eyelid hook (931) is connected to the pull rod (922) on one side; the second eyelid hook (932) is connected to the pull rod (922) on the opposite side.

5. The ophthalmic examination assist device of claim 2, wherein: The first moving component (71) includes: a moving block (711), on which a first sliding groove (712) and a second sliding groove (713) are sequentially opened along its axial direction; the first sliding groove (712) is slidably connected to the support frame (3); the second sliding groove (713) is slidably connected to the guide rod (63); a positioning member (714) is provided through one side of the moving block (711), the positioning member (714) is threadedly connected to the moving block (711), and a stop block (715) is provided on one side, the stop block (715) abutting against the arc groove (31) opened on the support frame (3).

6. The ophthalmic examination assist device of claim 2 or 5, wherein: The second moving component (72) includes: a connecting frame (721), a receiving plate (722) that can move freely within the connecting frame (721), and a limiting pin (725) that is inserted into the connecting frame (721); the connecting frame (721) is symmetrically provided with a plurality of first limiting holes (723); one end of the receiving plate (722) is connected to the auxiliary support mechanism (8), and a plurality of second limiting holes (724) are opened on it, the second limiting holes (724) having the same diameter as the first limiting holes (723); the limiting pin (725) passes through the first limiting holes (723) and the second limiting holes (724) in sequence, and limits and fixes the receiving plate (722).

7. The ophthalmic examination assist device of claim 6, wherein: The auxiliary support mechanism (8) includes: a housing (81), a base (82) disposed on one working surface of the housing (81), and a support arm (83) disposed opposite to and slidably connected to a slide rod (87) on the base (82); a gear drive device (84) is provided inside the housing (81), and a rotating rod is provided through one side, the rotating rod is fixedly connected to the gear drive device (84), and a locking device is attached to the outer sleeve; a return spring (86) is provided on the opposite side of the support arm (83), and a rack (85) is provided on the side close to the gear drive device (84), the rack (85) meshes with the gear drive device (84); the two support arms (83) are fixedly connected to two limiting frames (91) on the eyelid flipping mechanism (9) respectively through a first connecting arm (88) and a second connecting arm (89); the second connecting arm (89) is 1 / 3 of the length of the first connecting arm (88).

8. The ophthalmic examination assist device of claim 1, wherein: The chin support plate (5) is slidably connected to the mounting base (2) and threadedly connected to the threaded rod (55). The bottom end of the threaded rod (55) is connected to the horizontal plate (56) located inside the mounting base (2), and the driven bevel gear (54) is sleeved on it. A knob (51) is provided on one side of the mounting base (2). The knob (51) passes through one side of the mounting base (2) and is sleeved with the driving bevel gear (53). The driving bevel gear (53) and the driven bevel gear (54) mesh with each other.

9. The ophthalmic examination assist device of claim 1, wherein: The forehead support plate (6) has slots (61) on both sides, and the slots (61) engage with the support frame (3).

10. The ophthalmic examination assist device of claim 1, wherein: The support frame (3) is provided with a connecting frame (4) at its top.

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